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The journey from Glasgow to London is the quickest connection from Glasgow to any other major city with an average of 70 mph, including waiting times.

The slowest is the journey to Bradford, which averages just 40 miles per hour.

Rail journeys from Glasgow to the 20 other biggest British cities average 49 mph, which is above the national inter-city average of 42mph.

The slowest long-distance journey between all of the cities analysed is from Coventry to Hull. The 104-mile trip from one station to the other averages just 26 miles per hour, including waiting time for connection.